Redline Shockproof in the Transaxle

[Fylnn]

I have been reading an interesting post on one of the rally forums about some guys with Evo gearboxes running Redline Shockproof oil.  They reckon that it is blocking up oil passages and lunching gearboxes in 1 or 2 rallies in some cases.  Other guys have used it for ages and not had a problem. 

After Avanti rebuilt the transaxle in my GTV6 rally car it was recommended to use Redline Shockproof.  I must say the gear change with the new synchros Richard carefully put together is pretty magic.  It has survived 2 rallies and several shorter events.  I am not anticipating a problem and Evo's break gearboxes.  That is what they do and why they are so expensive to run.

But has anyone had any negative experience with Redline in a transaxle? 

[colcol]

Mitsubishi EVO's break gearboxes in road cars and when you rally them... i have heard good reports on MOTUL gearbox oil as well, i have seen the racing boys use blue coloured gearbox oil as well, but i don't know what brand it is, as mums the word!, If it seems to be working good, stick with Redline, Colin.

[MD]

Redline themselves recommend the use of Redline 75W90NS Light and/or Superlight   GL-5 for this application. The NS part is important as I tried just 75w90 and it did weird stuff with my LSD. It also wasn't as effective with synchros as other oils I have used.

[Fylnn]

Yes tend to think Alfa transaxles are a bit tougher.  As was said with an Evo it is not if but when your gearbox breaks. 

[Gisdan]

In defence of Evo's I rallied an Evo2 in state & national events & never had a problem with the driveline, like all comp vehicles if it's maintained correctly you usually don't have a problem.

Re the actual thread topic I run Redline in both my Alfetta transaxles & it has helped the change in one & not done much with the other but certainly not made it worse. BTW Redline gear oil is actually blue, despite the name, that's why they nickname it Smurf blood.
Cheers,

[hmd]

On recommendation of Vin Sharp, I run redline lightweight shockproof in my group S racecar.
No issues.

EVO gb breaks because, bigger turbo+more boost = more power/torque than factory setup.

Leave it stock and it probably never break.

[Steve S]

Redline Shockproof is not a standard type of gear oil. They do not even state what viscosity it is or if it's suitable for a synchronised GL-5 transaxle application. I thought it was more for gearboxes; they are not clear on how suitable it is for use with a hypoid diff. They do hint its viscosity is more like an 80w.
I see it as a "problem solver" or "last resort" when standard oils are not up the task. They do state to avoid using with pumps and filters as they may block up so there is some risk there however small it may be.

I would be happy to use 75w90NS and would only jump to Shockproof if it was deemed a necessity. I would also consider Castrol Syntrax 75w90 as it was specifically developed for racing transaxle applications.

[rowan_bris]

I disagree about it being an oil of last resort.  I use it in my 1985 GTV6 with a rebuilt TS box, in my 1976 1.8 Alfetta with a standard box and added it to my Lotus Elise Supercharged when it had 2000 klms on it all with significant improvement.

[brook308]

I disagree about it being an oil of last resort.  I use it in my 1985 GTV6 with a rebuilt TS box, in my 1976 1.8 Alfetta with a standard box and added it to my Lotus Elise Supercharged when it had 2000 klms on it all with significant improvement.

Have to agree, have used the Redline NS in a couple of alfetta transaxels with great results.
Have stripped down transaxels that have used Redline and the oil sticks to everything, clinging like sh1t to a blanket.